non nicotine geek bar Popcorn lung: What is it, and who is at risk? Harvard Health Chemical Concerns: Which Vapes Contain Diacetyl? Vaping Causes 'Popcorn Lung'? Snopes.com Doctors have linked vaping to a rare, incurable lung condition called obliterative bronchiolitis, often referred to as popcorn lung. The disease permanently scars and narrows the lungs' airways, causing lifelong breathing problems.